v0.1.0: MWM-48 configurable source for left per day (#23)

* MWM-48 adds a PotController and another method in spogVm for displaying amount left per day for the rest of the month from a user configured account list

* MWM-48 adds a Pot model with all associated JPA plumbing. It has a oneToMany relationship with accounts. Hopefully that works, who knows

* MWM-48 fixes the oneToMany pot->accounts link with EntityManager.merge. This seems to work but idk how it works. More research required. add pot and archive pot now work, albeity with only one account in the List of account in a given Pot

* MWM-48 adds in a few attempts and notes about accessing account.balances via the monthlyPot. Much more to learn about JPA stuff...

* MWM-48 ready for a deploy to prod to test the feature even if its implemented in a janky way

* MWM-48 removes left per day in debit from SPOG

* MWM-48 allows multiple accounts to be added into the monthly pot